> If you could find a way to measure expected range and consumption rate that
> would be helpful.  There is a parameter called tsfc (thrust specific fuel
> consumption factor) that can be added to each of the jet engine definitions in
> Aircraft-yasim/747.xml.  

David posted a figure from an airline pilot of 6000 lbs/h per engine
during cruise. I've now tried the 747-yasim in a cruise at M.82 at
FL370 and got around 2630 gal/h per engine, which is about 17700
lbs/h!

Based on that calculation, the correct TSFC seems to be 0.274 -- not
sure whether that's right though...

  Andras

===========================================================================
Major Andras
    e-mail: [EMAIL PROTECTED]
    www:    http://andras.webhop.org/
===========================================================================

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